This discussion clarifies the rules for Tax Deducted at Source (TDS) when only a partial payment is made to a vendor. If you book the full invoice amount and create a 100% liability, you must deduct 100% TDS on the entire amount, even if you only pay 50% to the vendor. TDS is generally deductible on the earlier of the invoice booking date or the payment date.
If we received Service Invoice for Rs.10000+18%GST=11800/- but we paid only 50% of amount to Vendor Rs.5900/- then we can deduct TDS 50% can pay to Department or we have to deduct 100% TDS and pay.